How to use the qtconsole.qt.QtGui.QTextCharFormat function in qtconsole

def __init__(self, text_edit):
        """ Create a call tip manager that is attached to the specified Qt
            text edit widget.
        """
        assert isinstance(text_edit, (QtGui.QTextEdit, QtGui.QPlainTextEdit))
        super(BracketMatcher, self).__init__()

        # The format to apply to matching brackets.
        self.format = QtGui.QTextCharFormat()
        self.format.setBackground(QtGui.QColor('silver'))

        self._text_edit = text_edit
        text_edit.cursorPositionChanged.connect(self._cursor_position_changed)

def _get_format_from_style(self, token, style):
        """ Returns a QTextCharFormat for token by reading a Pygments style.
        """
        result = QtGui.QTextCharFormat()
        for key, value in style.style_for_token(token).items():
            if value:
                if key == 'color':
                    result.setForeground(self._get_brush(value))
                elif key == 'bgcolor':
                    result.setBackground(self._get_brush(value))
                elif key == 'bold':
                    result.setFontWeight(QtGui.QFont.Bold)
                elif key == 'italic':
                    result.setFontItalic(True)
                elif key == 'underline':
                    result.setUnderlineStyle(
                        QtGui.QTextCharFormat.SingleUnderline)
                elif key == 'sans':
                    result.setFontStyleHint(QtGui.QFont.SansSerif)
                elif key == 'roman':

"""
        cursor.beginEditBlock()
        cursor.insertHtml(html)

        # After inserting HTML, the text document "remembers" it's in "html
        # mode", which means that subsequent calls adding plain text will result
        # in unwanted formatting, lost tab characters, etc. The following code
        # hacks around this behavior, which I consider to be a bug in Qt, by
        # (crudely) resetting the document's style state.
        cursor.movePosition(QtGui.QTextCursor.Left,
                            QtGui.QTextCursor.KeepAnchor)
        if cursor.selection().toPlainText() == ' ':
            cursor.removeSelectedText()
        else:
            cursor.movePosition(QtGui.QTextCursor.Right)
        cursor.insertText(' ', QtGui.QTextCharFormat())
        cursor.endEditBlock()